Right-to-Left Languages in InDesign: A Complete Localization Guide

The Middle East and North Africa represent one of the fastest-growing digital advertising markets, with MENA digital ad spend exceeding $10 billion annually. For design agencies serving this region, support for Arabic, Hebrew, and other right-to-left (RTL) languages isn't optional—it's essential. Yet many designers encounter broken text flows, reversed punctuation, and mangled character connections when they first work with RTL languages in InDesign. The good news: InDesign has built-in tools specifically for this. The challenge is knowing how to configure and use them correctly.

This guide walks you through every step of setting up InDesign for InDesign right-to-left languages, from enabling the Middle Eastern text engine to structuring frames and choosing the right fonts.

Enable the World-Ready Composer

By default, InDesign uses the Adobe Paragraph Composer—designed for left-to-right scripts. This composer will fail to render Arabic and Hebrew correctly. Broken ligatures, incorrect character connection, and jumbled diacritics are common symptoms.

The solution is the World-Ready Composer, also called the Middle Eastern & South Asian text engine. This engine understands bidirectional text, character shaping, and diacritical marks.

To enable it:

1. Go to InDesign > Preferences > Composition (Mac) or Edit > Preferences > Composition (Windows)
2. Under Composer, select World-Ready Composer from the dropdown
3. Click OK

Once enabled, all new documents and text frames will use this composer by default. If you're working on an existing file with RTL content, you'll need to recompose the text—select the text frames and go to Type > Composer > World-Ready Composer to apply the engine retroactively.

Switching composers is not permanent per document. Always verify the active composer when opening a file with RTL content, especially if the design was created by someone else or transferred between systems.

Setting Text Frame Direction

The second critical step is declaring the direction of your text frames themselves. This tells InDesign whether text should flow right-to-left or left-to-right within a frame.

To set frame direction:

1. Select your text frame
2. Go to Object > Text Frame Options
3. In the Story Direction dropdown, choose Right-to-Left for Arabic, Hebrew, and Urdu; leave it Left-to-Right for English or other LTR languages
4. Click OK

When you set a frame to RTL, several things change: the cursor direction reverses, line breaks occur at the left edge instead of the right, and InDesign treats numbers and punctuation according to bidirectional logic. Importantly, text frame direction is separate from the composer setting—you need both.

A common mistake is mixing LTR and RTL frames on the same page without isolating them visually. If you're designing a bilingual layout, keep RTL frames grouped separately from LTR frames and use consistent gutters and alignment guides.

Choosing the Right Fonts

Not all fonts support right-to-left scripts. A font must include:

• OpenType features for character shaping (substitution and positioning rules)
• Arabic or Hebrew glyphs in its character set
• Proper diacritic support (for accents, vowels, and special marks)

Fonts that work well for Arabic:

• Adobe Arabic — professional, widely used in publishing, excellent OpenType support
• Nassim — clean, modern, optimized for screen and print
• Arabic Typesetting — default on many Windows systems, adequate for general use
• Simplified Arabic — more compact, suited to smaller point sizes

Fonts that work well for Hebrew:

• David Libre — friendly, readable, open-source alternative
• Adobe Hebrew — professional grade, full diacritic support
• Miriam Libre — clean sans-serif, widely available

Fonts to avoid: System fonts labeled as "Arabic" or "Hebrew" but without OpenType features, or fonts that only simulate RTL by mirroring LTR characters. These produce incorrect character connection and are visually incorrect.

When selecting a font, always open a sample document with real Arabic or Hebrew text and check it on screen. Character connection, diacritic placement, and overall readability are critical.

Numbers and Punctuation in RTL Documents

One of the trickiest aspects of RTL design is bidirectional (bidi) text—the interplay between RTL and LTR within a single frame or line. InDesign handles this automatically, but understanding the rules helps you troubleshoot.

Numbers: Arabic text typically uses Western numerals (0–9) by default in InDesign, even though Arabic numerals exist (٠–٩). The choice depends on your client's preference and the document's context. If you must use Arabic numerals, ensure the font family includes them and set the character's text direction explicitly.

Punctuation: Periods, commas, and other marks are often mirrored in RTL contexts. For example, opening parentheses might shift to the right side. InDesign's World-Ready Composer handles this automatically; however, test your punctuation placement visually to ensure it matches your client's expectations.

Mixed LTR/RTL lines: If you're creating a line with both Arabic and English (e.g., a product name or brand mention), InDesign will reorder the text logically but visually display it correctly. This usually works, but always proof the output carefully.

Working with IDML Files for RTL Translation

If you're exporting your design for translation, you're likely working with IDML files (InDesign Markup Language). IDML is an XML-based format that preserves all design information, including text direction.

When you save a document with RTL frames as IDML and send it to a translator, they receive a structured file where each text frame's direction and composer settings are embedded. Professional translation tools and custom scripts can parse this data and translate the Arabic or Hebrew text while preserving layout.

Here's what happens: an IDML file contains a <Story> element for each text frame. Within that story, a <ParaStyle> tag includes direction attributes. When a translator opens the file in a specialized tool (or when processed by a script), the direction is respected, and the translated text reflows according to InDesign's RTL rules.

This is why it matters: if you're designing a layout intended for RTL translation, make sure each text frame's direction is set correctly before exporting to IDML. A frame set to LTR will stay LTR in the IDML, and translated text will render incorrectly. For more on IDML structure and translation workflows, see our guide to IDML file formats.

TranslateInDesign's parser automatically detects and respects the story direction attributes embedded in IDML files, so your RTL layouts stay intact throughout translation and back to your original file.

Common Pitfalls and How to Avoid Them

Pitfall 1: Forgetting the World-Ready Composer

Text looks broken or misspelled despite using a proper RTL font. Check Preferences > Composition and ensure the World-Ready Composer is selected.

Pitfall 2: Mixing Frames Without Visual Separation

On a bilingual layout with both Arabic and English, overlapping or adjacent frames can cause confusion about which frame is which. Use clear spatial separation, guides, or background shapes to visually isolate RTL frames.

Pitfall 3: Wrong Text Frame Direction

A frame set to LTR will display RTL text right-aligned but not reflow correctly. Always set the frame direction to match the text language.

Pitfall 4: Table Cells Not Flipped

InDesign tables don't automatically flip cell direction. If you're placing Arabic text in a table, you may need to manually adjust cell alignment or use a workaround (like converting the table to a text frame or adjusting cell paragraph direction independently).

Pitfall 5: Applying Styles Inconsistently

If some paragraphs in the same frame use different composers or text directions, recompose the entire frame and double-check each style definition.

Putting It All Together

Setting up a document for right-to-left languages involves three layers: the document-wide composer (World-Ready), the frame-level direction (RTL), and the font (supporting OpenType). Missing any one will break your layout.

Start here:

1. Enable World-Ready Composer in Preferences
2. Set each RTL text frame to Right-to-Left direction
3. Choose a font with proper OpenType and character support
4. Test with real text and proof carefully

If you're translating a design into Arabic or Hebrew and exporting to IDML, this setup ensures your InDesign localization workflow is correct from the start. Your translator receives a well-formed file, and when translated text comes back, it renders properly.

Translating an InDesign file with Arabic or Hebrew content? TranslateInDesign handles RTL layouts automatically—no manual frame adjustments or recomposition needed. Try it free and see how much faster localization becomes.